1305099 has 8 divisors (see below), whose sum is σ = 1933520. Its totient is φ = 870048.

The previous prime is 1305097. The next prime is 1305121. The reversal of 1305099 is 9905031.

It is not a de Polignac number, because 1305099 - 2¹ = 1305097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 48337 = 1305099 / (1 + 3 + 0 + 5 + 0 + 9 + 9).

It is a Duffinian number.

1305099 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24142 + ... + 24195.

It is an arithmetic number, because the mean of its divisors is an integer number (241690).

2^1305099 is an apocalyptic number.

1305099 is a deficient number, since it is larger than the sum of its proper divisors (628421).

1305099 is an equidigital number, since it uses as much as digits as its factorization.

1305099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48346 (or 48340 counting only the distinct ones).

The product of its (nonzero) digits is 1215, while the sum is 27.

The square root of 1305099 is about 1142.4092961807. The cubic root of 1305099 is about 109.2817947735.

The spelling of 1305099 in words is "one million, three hundred five thousand, ninety-nine".